Leases - Depreciation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
General and Administrative Expense
Lessor, Lease, Description [Line Items]
Depreciation expense related to corporate assets	$ 3	$ 3	$ 2
Other Assets
Lessor, Lease, Description [Line Items]
Accumulated depreciation related to corporate assets	$ 10	$ 10